Re: [Discuss-gnuradio] USRP and RFID

[Fabian Steiner]

Hi!

Thanks a lot Matthias for your answer!
I had a close look at the Gen2 stuff and it sounds rather promising
although they are working with UHF tags.

As far as my project is concerned I will start with some basic experiments
the next days: First of all, I just want see whether the general system
works as expected (using usrp_fft.py, usrp_oscope.py, etc.) when emitting
a continuous sine wave at 13.56Mhz and receiving the subcarrier signal
afterwards. If this yields the expected results, I will let you know and
take care of the modulation & demodulation thing then.

Cheers,
Fabian


> Hi,
>
> there is a project for Gen2 RFID chips, they have a reader implementation
> for the USRP1 and a monitoring tool to eavesdrop on reader-tag
> communication for the USRP2:
> https://www.cgran.org/wiki/Gen2
>
> There are also papers on the design posted there. They had to tinker with
> the USB driver as well because of timing issues with the reader.
>
> I think Gen2 is only ~868MHz, I don't know if the code can be adapted to
> 13.56MHz stuff.  And for a (duplex) reader you will need a URSP1 there,
> because two 900-daughterboards are required. It may be possible out of the
> box to build a reader for 13.56MHz with the USRP2, as you have two
> "half"-daughterboards.
>
> For the protocol implementation, you can take a look at
> http://www.libnfc.org
> it seems that they have some Gen1 support and you only have to implement
> the physical layer in gnuradio.
>
> We are currently thinking to start a RFID project as well, so I'm
> interested what you find out.
>
> Matthias
>
>
> Am 25.08.2010 um 16:38 schrieb address@hidden:
>
>> Hello!
>>
>> We are just working on a project aiming at investigating the use of the
>> Ettus USRP device concerning RFID sniffing. According to the manuals,
>> purchasing the LFTX and the RFTX devices should be suitable for being
>> able
>> to talk to 125kHz and 13,56Mhz RFID devices. What kind of antennas do
>> you
>> recommend for this purpose? Will simple loops of copper suffice?
>>
>> Are there any tutorials or papers available which concentrate on using
>> Gnuradio in terms of RFID? I know that OpenPCD & Co might offer an
>> easier
>> way to go, but as I want to learn about the stuff I decided to go the
>> more
>> difficult way.
>>
>> Thanks for your help any kind of comment,
>> Fabian Steiner
>
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